我在使用ScriptManager的RegisterClientScriptBlock时遇到问题 .
我有一个AsyncFileUpload，我想在上传后动态预览上传的图像 .
UploadedComplete连接在Page_Init中，这是服务器端的UloadedComplete块代码
void fileUpload_UploadedComplete(object sender, AjaxControlToolkit.AsyncFileUploadEventArgs e)
{
string csb = string.Empty;
string tempfolder = "picserver/posts/temp/" + Session["Username"] + "_" + DateTime.Today.ToString("yyyy_MM_d") + ".jpg";
string newfile = Server.MapPath(tempfolder);
fileUpload.SaveAs(newfile);
Byte[] f = File.ReadAllBytes(newfile);
Imaging i = new Imaging();
i.ResizeImageFile(newfile, newfile, 64);
csb = "$(\"" + postImagePreview.ClientID + "\").innerHTML = '<img src=\"" + tempfolder + "\" alt=\"\" />'";
System.Diagnostics.Debug.WriteLine("CSB: " + csb);
ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "preview", csb, true);
}
这是html
<asp:Label ID="postImagePreview" runat="server" />
Upload a preview of your advertisement.
<asp:AsyncFileUpload ID="fileUpload" runat="server"
UploaderStyle="Traditional" UploadingBackColor="#CCFFFF" ThrobberID="myThrobber" />
<asp:Label runat="server" ID="myThrobber" style="display:none;" ></asp:Label>
这是我的ScriptBlock
csb = "$(\"" + postImagePreview.ClientID + "\").innerHTML = '<img src=\"" + tempfolder + "\" alt=\"\" />'";
ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "preview", csb, true);
并且它不起作用..即使我把“警告（'你好'）;”在脚本参数中 . 仍然无法正常工作 .
你们有什么想法吗？
1 回答
这是由当前版本的AsyncFileUpload控件中的错误引起的 . 基本上它清除内容，写入控件，然后结束请求 . 这可以防止脚本块呈现 . 更多细节和解决方法可以在AJAX Control Toolkit上看到bug tracker